Re: Experience with HP Smart Array P400 and SATA drives? - Mailing list pgsql-performance

From Kevin Grittner
Subject Re: Experience with HP Smart Array P400 and SATA drives?
Date
Msg-id 49395B57.EE98.0025.0@wicourts.gov
Whole thread Raw
In response to Experience with HP Smart Array P400 and SATA drives?  (Mario Weilguni <mweilguni@sime.com>)
Responses Re: Experience with HP Smart Array P400 and SATA drives?  (Alan Hodgson <ahodgson@simkin.ca>)
Re: Experience with HP Smart Array P400 and SATA drives?  (Mario Weilguni <mweilguni@sime.com>)
List pgsql-performance
>>> Mario Weilguni <mweilguni@sime.com> wrote:
> Has anyone benchmarked this controller (PCIe/4x, 512 MB BBC)? We try
to
> use it with 8x SATA 1TB drives in RAID-5 mode under Linux, and
measure
> strange values. An individual drive is capable of delivering 91
MB/sec
> sequential read performance, and we get values ~102MB/sec out of a
> 8-drive RAID5, seems to be ridiculous slow. Write performance seems
to
> be much better, ~300 MB /sec - seems ok to me.

What's your stripe size?

-Kevin

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